Along time ago, in a universe far, far, away, a course started at "the college".
Out of 31 'cadets' who started, all of who were either:-
a) Ex assistants, min 5 'O' Levels, (GCSEs).
b) Direct Entrants, (min 5 'O' Levels, plus 2 'A" Level passes in either Maths, Geography or a Science subject).
c) Graduates, (min 2, usually 3, A Level passes).
27 Graduated from the "United Kingdom College Of Air Traffic Control".
All validated, and 3 of these are now senior airline captains.
Let's get back to basics.